[Vwdiesel] Oil pressure problem

[gary]

Sounds like a definite restriction between the main oil gallery and the
head circuit.

Your cam needs oil pressure as much as the the mains do. I wouldn't
bother trying to fool the oil pressure sensor at the head. You will be
happily driving down the freeway at some reasonable speed when the cam
decides it has had enough and disintegrates, taking the pistons, valves,
and/or rods with it. 

There is no easy way I can think of the clear the obstruction short of
pulling the head unfortunately.


-Gary




On Sun, 2004-08-29 at 16:25, mikitka wrote:
> I have hooked up a mechanical pressure gage to the head. That is how I know
> it is getting 20psi cold start till it warms up then I get zero. I have not
> tried running the engine with the sensor out of the head to see how much oil
> flows out. That is my next thing to check.
> 
> Yep the "OBEN" is visible looking down and on the left side just behind the
> #2 injector. 
> 
> It just isn't making sense. I have a ton of oil just no pressure at
> operating temp. 
> 
> The only thing I can think of to solve my oil light/buzzer problem is to
> "T"in the low pressure sensor down at the high pressure sensor. Seems like
> this would work. I would just loose any oil readings I wanted to get off my
> mechanical gage unless I work it in to that "T" and then it would be a real
> mess in that area with all those connections.
> Nick
> 
> -----Original Message-----
> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On
> Behalf Of gary
> Sent: Friday, August 27, 2004 1:38 PM
> To: VWDiesel
> Subject: Re: [Vwdiesel] Oil pressure problem
> 
> Before you jump off the deep end, I would check the pressure at the head
> with a mechanical gauge. You could simply have a bad sender. With as
> much oil in the head area as you say, this would be my first guess.
> 
> The pressure felt at the filter and the head should be almost identical.
> You can't have 70psi at the filter and zero at the head without some
> serious restriction in the head oil circuit.
> 
> You mentioned the gasket was installed correctly. "OBEN" visible looking
> down on the gasket tab?
> 
> -Gary
> 
> 
> 
> On Fri, 2004-08-27 at 17:11, mikitka wrote:
> > Hello,
> > 
> >  
> > 
> > New to the list and have enjoyed all that I have read.  I have just
> rebuilt
> > a 91 Jetta TD with the 1.6.  It is bored .020 over and has new pistons,
> > rings, bearings, well you get the idea. The head was done and is good.
> The
> > problem I'm having is when the engine gets up to operating temp I have
> zero
> > oil pressure.  At cold start up with 15w-40 Pennzoil Long Life I get 20
> psi
> > at the head port but at temp it is zero even at 3K RPM.  This is causing
> my
> > oil light/buzzer to go off and it is driving me crazy.  I have put 1600
> > miles on the engine since I rebuilt it. Runs strong as can be. The head is
> > getting so much oil that it is getting sucked out of the valve are by the
> > breather.  The head has been checked, the head gasket is installed
> properly,
> > it is a new oil pump, all new bearings. Just no oil pressure at the head.
> > The oil port at the oil filter has 70psi at 2K rpm.  Has anyone else have
> > this problem.  How can I disable the oil light/buzzer?  It gets annoying
> > driving down the highway. Not to mention in town when there is no
> > engine/wind noise to drown it out.
> > 
> >  
> > 
> > Thanks
> > 
> > Nick
> > 
> > _______________________________________________
> > Vwdiesel mailing list
> > Vwdiesel at vwfans.com
> > http://www.audifans.com/mailman/listinfo/vwdiesel
> 
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